|Jul 30, 2018
||Thigh Hamstring Sprain/Pull Unspecified Grade 1
||Armstead missed time during training camp with a hamstring injury but was ready for Week 1.
|Feb 26, 2018
||Armstead had a "minor cleanup" surgery on his foot.
|Oct 15, 2017
||Hand Metacarpal Fracture
||Armstead broke his hand in Week 6, needed surgery and missed the final 10 games of the season.
|Nov 6, 2016
||Shoulder Labrum Tear
||Armstead missed the final 8 games of the 2016 season with a torn labrum in his left shoulder that required surgery.